/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jute;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;

/**
 * Front-end for serializers. Also serves as a factory for serializers.
 *
 */
public class RecordWriter {

	static private HashMap archiveFactory = constructFactory();

	static HashMap constructFactory() {
		HashMap factory = new HashMap();
		Class[] params = { OutputStream.class };
		try {
			factory.put("binary", BinaryOutputArchive.class.getDeclaredMethod("getArchive", params));
			factory.put("csv", CsvOutputArchive.class.getDeclaredMethod("getArchive", params));
			factory.put("xml", XmlOutputArchive.class.getDeclaredMethod("getArchive", params));
		} catch (SecurityException ex) {
			ex.printStackTrace();
		} catch (NoSuchMethodException ex) {
			ex.printStackTrace();
		}
		return factory;
	}

	static private OutputArchive createArchive(OutputStream out, String format) throws IOException {
		Method factory = (Method) archiveFactory.get(format);
		if (factory != null) {
			Object[] params = { out };
			try {
				return (OutputArchive) factory.invoke(null, params);
			} catch (IllegalArgumentException ex) {
				ex.printStackTrace();
			} catch (InvocationTargetException ex) {
				ex.printStackTrace();
			} catch (IllegalAccessException ex) {
				ex.printStackTrace();
			}
		}
		return null;
	}

	static private OutputArchive getBinaryArchive(OutputStream out) {
		return new BinaryOutputArchive(new DataOutputStream(out));
	}

	static private OutputArchive getCsvArchive(OutputStream out) throws IOException {
		try {
			return new CsvOutputArchive(out);
		} catch (UnsupportedEncodingException ex) {
			throw new IOException("Unsupported encoding UTF-8");
		}
	}

	static private OutputArchive getXmlArchive(OutputStream out) throws IOException {
		return new XmlOutputArchive(out);
	}

	private OutputArchive archive;

	/**
	 * Creates a new instance of RecordWriter
	 * 
	 * @param out    Output stream where the records will be serialized
	 * @param format Serialization format ("binary", "xml", or "csv")
	 */
	public RecordWriter(OutputStream out, String format) throws IOException {
		archive = createArchive(out, format);
	}

	/**
	 * Serialize a record
	 * 
	 * @param r record to be serialized
	 */
	public void write(Record r) throws IOException {
		r.serialize(archive, "");
	}
}
